scholarly journals Distribution patterns of riodinid butterflies (Lepidoptera: Riodinidae) from southern Brazil

2014 ◽  
Vol 53 (1) ◽  
Author(s):  
Ricardo R Siewert ◽  
Cristiano A Iserhard ◽  
Helena P Romanowski ◽  
Curtis J Callaghan ◽  
Alfred Moser
Keyword(s):  
Distribution Patterns ◽  
Southern Brazil

scholarly journals Microhabitat of small mammals at ground and understorey levels in a deciduous, southern Atlantic Forest

2013 ◽  
Vol 85 (2) ◽  
pp. 727-736 ◽  
Author(s):  
GERUZA L. MELO ◽  
BARBARA MIOTTO ◽  
BRISA PERES ◽  
NILTON C. CACERES
Keyword(s):  
Habitat Selection ◽  
Small Mammals ◽  
Strong Evidence ◽  
Animal Species ◽  
Deciduous Forest ◽  
Distribution Patterns ◽  
Microhabitat Use ◽  
Southern Brazil ◽  
Different Types ◽  
Didelphis Albiventris

Each animal species selects specific microhabitats for protection, foraging, or micro-climate. To understand the distribution patterns of small mammals on the ground and in the understorey, we investigated the use of microhabitats by small mammals in a deciduous forest of southern Brazil. Ten trap stations with seven capture points were used to sample the following microhabitats: liana, fallen log, ground litter, terrestrial ferns, simple-trunk tree, forked tree, and Piper sp. shrubs. Seven field phases were conducted, each for eight consecutive days, from September 2006 through January 2008. Four species of rodents (Akodon montensis, Sooretamys angouya, Oligoryzomys nigripes and Mus musculus) and two species of marsupials (Didelphis albiventris and Gracilinanus microtarsus) were captured. Captured species presented significant differences on their microhabitat use (ANOVA, p = 0.003), particularly between ground and understorey sites. Akodon montensis selected positively terrestrial ferns and trunks, S. angouya selected lianas, D. albiventris selected fallen trunks and Piper sp., and G. microtarsus choose tree trunks and lianas. We demonstrated that the local small-mammal assemblage does select microhabitats, with different types of associations between species and habitats. Besides, there is a strong evidence of habitat selection in order to diminish predation.

Area usage estimation and spatiotemporal variability in distribution patterns of southern right whales,Eubalaena australis, of southern Brazil

2018 ◽  
Vol 39 (3) ◽  
pp. e12506 ◽  
Author(s):  
Eduardo Pires Renault-Braga ◽  
Karina Rejane Groch ◽  
Paulo A. de Carvalho Flores ◽  
Eduardo R. Secchi ◽  
Luciano Dalla-Rosa
Keyword(s):  
Distribution Patterns ◽  
Spatiotemporal Variability ◽  
Southern Brazil ◽  
Eubalaena Australis ◽  
Right Whales ◽  
Southern Right Whales

Variability and trends of intense precipitation in a metropolitan area in the southern Brazil

2020 ◽  
Author(s):  
Daniel Allasia ◽  
Ingrid Petry ◽  
Raviel Basso ◽  
Rutineia Tassi ◽  
Bruna Minetto
Keyword(s):  
Metropolitan Area ◽  
Distribution Patterns ◽  
Convective Precipitation ◽  
Southern Brazil ◽  
Sources Of Information ◽  
Urban Centers ◽  
Heat Islands ◽  
Intense Precipitation ◽  
Impact Of Urbanization ◽  
The Impact

<p>With the increase in the global population observed since the 20th century, urban centers are becoming more prominent, and its dynamic is now far from the natural. The impact of urbanization on the rainfall has been noticed since 1921 when Horton observed that cities with more than 100,000 inhabitants created favorable conditions for convective precipitation. Later, Huff and Changnon (1972) estimated an increase of 6 to 15% on average rainfall during the summer in these regions. Several other studies confirmed the trend and pointed out that on a small and medium scale, precipitation change is usually justified by the effect of heat islands. To understand these changes, high-resolution precipitation data is needed; however, due to the lack of monitored data, especially on the largest cities in the developing countries, new sources of information should be used. MSWEP is a three hourly gridded precipitation dataset, with 0.1º spatial resolution that combines data from gauges, satellite, and reanalysis-based data to provide precipitation estimates over the entire globe (Beck, 2019). In this study, MSWEP precipitation was used in order to observe the variability of intense precipitation over the Metropolitan Area of Porto Alegre in Southern Brazil, where some previous studies indicated urban effects on precipitation. Statistical analysis was performed to evaluate changes in the intense precipitation throughout the decades. The results show that the spatial distribution patterns of intense precipitation are maintained; however, in all statistics, it was possible to observe an increase in intense precipitation over the decades, that follows the increase of the urbanized area over time.</p>

scholarly journals Seasonality of macroalgal communities in a subtropical drainage basin in Paraná state, southern Brazil

2008 ◽  
Vol 68 (4) ◽  
pp. 741-749 ◽  
Author(s):  
CCZ. Branco ◽  
RA. Krupek ◽  
CK. Peres
Keyword(s):  
Drainage Basin ◽  
Seasonal Pattern ◽  
Linear Regression Analysis ◽  
Sampling Site ◽  
Temporal Distribution ◽  
Detrended Correspondence Analysis ◽  
Floristic Composition ◽  
Distribution Patterns ◽  
Multiple Linear Regression Analysis ◽  
Southern Brazil

Seasonal dynamics of macroalgal communities was analyzed monthly by samplings in three stream segments of the Pedras River Basin, mid-south region of Paraná State, southern Brazil, from April 2004 to March 2005. The seasonal fluctuations in macroalgal species richness and abundance were correlated with selected environmental variables. In general, the seasonal distribution patterns of these communities were distinct from those reported from other tropical and temperate regions, with higher macroalgal richness and abundance observed from late spring to late fall. Multiple linear regression analysis revealed that the stream variable most closely related with the temporal distribution pattern observed was temperature, which had a very similar seasonal pattern to the biological parameters. On the other hand, the floristic composition was quite diverse in the streams sampled. Among the 25 taxa identified, only two were common to the three streams whereas 15 were restricted to a single sampling site. These data indicate that, although temperature seems to be an effective relationship with global temporal pattern, particular characteristics of each stream can strongly influence the seasonal tendencies in local scale. The results of Detrended Correspondence Analysis (DCA) and Cluster Analysis corroborated this observation.

scholarly journals Community structure and tree diversity in a subtropical forest in southern Brazil

2019 ◽  
Vol 19 (2) ◽  
Author(s):  
Kauane Maiara Bordin ◽  
Letícia Daiana Ferreira ◽  
Adriano Rosina ◽  
Marciana Malacarne ◽  
Patricia Zanotelli ◽  
...  
Keyword(s):  
Community Structure ◽  
Species Composition ◽  
Distribution Patterns ◽  
Taxonomic Diversity ◽  
Abundant Species ◽  
Subtropical Forest ◽  
Southern Brazil ◽  
Floristic Similarity ◽  
Thermal Amplitude ◽  
Linkage Method

Abstract: Local and regional environmental variations lead to different species composition, creating transitional areas. An example is the Araucaria and Seasonal forest in southern Brazil. Our objectives were (1) to describe the tree community structure and composition of a subtropical forest in southern Brazil and (2) to compare the floristic relationships between two forest typologies (Araucaria and Seasonal forest) in order to characterize the study area and the distribution patterns of tree species. We conducted a survey at Chapecó National Forest (in southern Brazil) in an area of 1.2 ha, where all individuals ≥ 30 cm of circumference at breast height were sampled. Community structure was described using the traditional phytosociological parameters. The floristic relationships were obtained by comparing our results with compiled data from other scientific papers through cluster analyses using an unweighted average linkage method, based on Jaccard similarity coefficient. We sampled 809 individuals belonging to 61 species and 28 families. The richest family was Fabaceae and Coussarea contracta (Walp.) Müll.Arg. was the most abundant species. Taxonomic diversity was 3.06 and the evenness was 0.74. The floristic similarity revealed that species composition of our study area is more similar to Seasonal forest. Species composition is related to environmental factors such as great thermal amplitude and seasonality. This subtropical forest is well structured, highly diverse and extremely important for the local and regional biodiversity conservation.

Distribution patterns of interstitial polychaetes in sandy beaches of southern Brazil

2009 ◽  
Vol 30 (1) ◽  
pp. 47-62 ◽  
Author(s):  
Maikon Di Domenico ◽  
Paulo da Cunha Lana ◽  
André R. S. Garraffoni
Keyword(s):  
Distribution Patterns ◽  
Sandy Beaches ◽  
Southern Brazil

scholarly journals Seasonal pattern of Chrysomelidae (Coleoptera) in the state of Paraná, southern Brazil

2013 ◽  
Vol 13 (1) ◽  
pp. 153-162 ◽  
Author(s):  
Adelita Maria Linzmeier ◽  
Cibele Stramare Ribeiro-Costa
Keyword(s):  
Host Plants ◽  
Seasonal Pattern ◽  
Distribution Patterns ◽  
Abundant Species ◽  
The State ◽  
Seasonal Patterns ◽  
Southern Brazil ◽  
The Family ◽  
Family Level ◽  
And Behavior

The aim of this paper was to describe the seasonal patterns of Chrysomelidae and of its most abundant species at eight sites in different geomorphological and floristic regions in the state of Paraná, southern Brazil. Samples with Malaise traps, from August 1986 to July 1988 were performed. The Chrysomelidae showed seasonal patterns with the highest abundance in the spring and/or summer at all sites, but with variations in the months of highest captures. Photoperiod was the variable that most influenced the seasonality of Chrysomelidae, and along with temperature and relative humidity, determined most of the seasonal patterns of the family at the different sites. Some dominant species of Chrysomelidae showed different seasonal pattern compared to the family level. A better knowledge of the seasonal distribution patterns of these species will only be possible when their life history, such as host plants and behavior, was better understood.

Black-fly assemblage distribution patterns in streams in disturbed areas in southern Brazil

Acta Tropica ◽  
2014 ◽  
Vol 140 ◽  
pp. 26-33 ◽  
Author(s):  
Sheyla Regina Marques Couceiro ◽  
Neusa Hamada ◽  
Lúcia Beatriz Sagot ◽  
Mateus Pepinelli
Keyword(s):  
Distribution Patterns ◽  
Southern Brazil ◽  
Black Fly ◽  
Disturbed Areas

scholarly journals Floristic composition, environmental variation and species distribution patterns in burned grassland in southern Brazil

2006 ◽  
Vol 66 (4) ◽  
pp. 1073-1090 ◽  
Author(s):  
G. E. Overbeck ◽  
S. C. Müller ◽  
V. D. Pillar ◽  
J. Pfadenhauer
Keyword(s):  
Soil Properties ◽  
Vegetation Type ◽  
Floristic Composition ◽  
Distribution Patterns ◽  
Forest Edge ◽  
Southern Brazil ◽  
Low Frequencies ◽  
The North ◽  
Soil Variables ◽  
Strong Relation

In regularly burned grassland on Morro Santana, Porto Alegre, RS, Brazil, we investigated differences in the floristic composition and their relation to soil properties, aspect and distance from the forest border. In 48 plots of 0.75 m², we identified a total of 201 species from a local species pool of approximately 450 to 500 species. Most species occurred in low frequencies, showing clumpy distribution patterns in the studied area. Multivariate analysis showed that plots close to the forest edge clearly differed from plots in the open grassland concerning composition and structure. Plots exposed to the north differed from plots on the top of the hill both in the composition of species as well as in soil variables, mainly due to shallower soil in the former. No strong relation between soil properties and variation in vegetation composition could be detected at a finer scale. The studied grassland, as all grassland vegetation in southern Brazil, is very rich in species compared to other grassland formations worldwide. However, this high biodiversity and conservational value of Campos vegetation in general has so far not been recognized properly. Disturbance is essential to maintain this open vegetation type and its species richness. Fire should be considered as a management option in the absence of grazing.

Effects of macroinfauna sediment disturbance on nematode vertical distribution

2006 ◽  
Vol 86 (2) ◽  
pp. 227-233 ◽  
Author(s):  
T.K. Pinto ◽  
M.C. Austen ◽  
C.E. Bemvenuti
Keyword(s):  
Community Structure ◽  
Vertical Distribution ◽  
Distribution Patterns ◽  
Trophic Groups ◽  
Southern Brazil ◽  
Sediment Disturbance ◽  
Subtropical Estuary ◽  
Sediment Layers ◽  
Deposit Feeding ◽  
The Vertical Distribution

Within a subtropical estuary in southern Brazil, an experiment was carried out to test the hypotheses that the deposit feeding macrofaunal polychaete Laeonereis acuta affects nematode community structure and the vertical distribution patterns of nematodes in sediments. Inclusion cages were deployed with two different densities of the polychaete and meiofaunal nematodes were sampled from six different vertical sediment layers: 0–1, 1–2, 2–4, 4–6, 6–8 and 8–10 cm depth. Although L. acuta did change the vertical distribution of both nematode and trophic groups in the sediment, allowing nematodes to inhabit deeper sediment layers, there were no apparent effects of different polychaete densities.

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